13245646 has 4 divisors (see below), whose sum is σ = 19868472. Its totient is φ = 6622822.

The previous prime is 13245643. The next prime is 13245647. The reversal of 13245646 is 64654231.

13245646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64654231 = 5711 ⋅11321.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13245643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311410 + ... + 3311413.

It is an arithmetic number, because the mean of its divisors is an integer number (4967118).

Almost surely, 2^13245646 is an apocalyptic number.

13245646 is a deficient number, since it is larger than the sum of its proper divisors (6622826).

13245646 is an equidigital number, since it uses as much as digits as its factorization.

13245646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6622825.

The product of its digits is 17280, while the sum is 31.

The square root of 13245646 is about 3639.4568276049. The cubic root of 13245646 is about 236.6052524196.

Adding to 13245646 its reverse (64654231), we get a palindrome (77899877).

The spelling of 13245646 in words is "thirteen million, two hundred forty-five thousand, six hundred forty-six".